fhi7.2: introduce support for T1a and Ta4 values larger than TTI interval

In xRAN, it appears that T1a/Ta4 values are assumed to be within a TTI.
When T1a/Ta4 values with larger than a TTI are used, this causes two issues: (1) C-plane packets to be generated later than expected and (2) oai_xran_fh_rx_callback() receives the wrong timing information resulting in potentially empty/stale PUSCH/PRACH data to be read.

In this patch, we modify xRAN to make it handle large T1a/Ta4 values properly.
The changes include: (1) three additional variables in offset_num_slots_* (xran_dev.h), (2) modify "xran_timing_create_cbs" and "xran_timer_arm_for_deadline" (xran_cb_proc.c), and (3) revise "tx_cp_dl_cb" and "tx_cp_ul_cb" (xran_main.c).
Additionally, we add additional guard conditions to prevent xran_tx_proc.c from sending U-plane packets when it is not a downlink slot.

This commit is contained in:

Xin Zhe Khooi

2026-02-02 15:00:01 +00:00

parent 9cb79027e4

commit 003d72c859

2 changed files with 226 additions and 80 deletions

									
										radio/fhi_72/CMakeLists.txt
									
		+1
		-1
	
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				@@ -17,7 +17,7 @@ add_library(oran_fhlib_5g MODULE

				)

				set(E_VERSION 5.1.6)

				set(F_VERSION 6.1.7)

				set(F_VERSION 6.1.8)

				find_package(xran REQUIRED)

				if(xran_VERSION VERSION_EQUAL E_VERSION)